Engineering Material Guide
Choosing the right alloy is a critical balance between Wear Resistance, Impact Toughness, and Cost. Use our technical guide to specify your next set of knives.
Standard Tool Steel
An economical base option. It offers high shock absorption preventing cracks, making it forgiving for basic applications, though it requires more frequent sharpening.
Low Alloy Steel (9CrSi)
A highly reliable workhorse. By incorporating Chromium and Silicon, it bridges the gap perfectly—offering fantastic resilience against chipping when cutting unpredictable materials.
High Chrome (D2 / SKD-11)
The premium standard for clean plastic recycling. Vacuum heat-treated to HRC 58-60 to deliver exceptional long-term edge retention and clean cuts without melting plastics.
Tungsten Carbide Inlaid
Engineered for the most brutal environments. Features brazed solid carbide cutting edges. Lifespan outlasts standard alloy steel by up to 10-20x in highly abrasive setups.
4 Rules for Blade Specification
Abrasiveness
Processing materials with glass fiber or sand requires high-hardness alloys like D2 or Carbide to prevent rapid dulling.
Impact Risk
If your feed stream contains unexpected metal (bolts, thick wire), overly hard blades will shatter. Choose tough 9CrSi Alloy instead.
Operating Temp
High-speed continuous cutting generates intense friction. For hot applications without coolant, heat-resistant steel is required.
Total Cost
Match the blade cost to your production scale. Don't buy Carbide for low-volume runs, but don't use Carbon steel for 24/7 lines.
Material Specifications & Cost Indicator
| Material Grade | Tested Hardness | Primary Characteristic | Cost Multiplier | Est. Price (Standard 300mm) |
|---|---|---|---|---|
| Carbon Tool Steel | HRC 52 - 56 | High Shock Resistance | 1.0x (Base) | $15 - $30 / pc |
| Low Alloy (9CrSi) | HRC 54 - 58 | Excellent Toughness | 1.5x | $25 - $45 / pc |
| Premium D2 / SKD-11 | HRC 58 - 62 | High Wear Resistance | 2.5x - 3.0x | $50 - $80 / pc |
| Tungsten Carbide Inlaid | HRC 85 - 92 | Extreme Edge Life | 8.0x - 12.0x | $200+ / pc |
* Prices are estimates based on a standard 300mm flat granulator blade. Actual pricing depends on thickness, bevel complexity, and order volume.
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